Carbureter



A. L. PAYTON.

CARBURETER. APPLICATION FILED SEPT. 20, I917.

1,367,787, Patented Feb. 8,1921.

ARTHUR L. rAY'roN, or CHICAGO, ILLINOIS.

Specification of Letters Patent.

CARBURETER.

Application filed September 20, 1917. semi no. 192,256.

To all whom it may concern:

Be it known that I, ARTHUR L. PAYTON, 'a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain'new and useful Improvement in Carburetors, which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, formlng a part of this specification.

My invention relates to carburetors for internal combustion engines, and has for its generalobject the provision of a novel arrangement of parts for securing thorough volatilization of the fuel delivered by the carburetor to the working cylinders of the internal combustion engine.

A further object of the present invention resides in the provision of a new, simple and effective arrangement of parts for automat-' ically controlling the supply-of air -or fuel or both to the internal combustion englne, the

said parts being controlled by the suction producing means of the engine. These and other objects of the invention will be pointed out in detail in connection with the accompanying drawings, wherein Figure 1 is a vertical sectional view of one form of carbureter constructed in accordance with my invention; and

Fig. 2 is a detail side view of one of the air intake tubes shown in Fig. 1.

Similar characters of reference similar parts in both views.

In the drawings 1 designates a casing provided with a bore2 extending longitudinally therethrough. One end of the caslng 11's provided with the flanges shown at 3-3,

refer to which serve to facilitate attachment of the ternal combustion engine.

carbureter to an intake manifold of an in- The usual form of throttle valve is employed at Q to control the passage of air and fuelthrough the bore 2. Forming a part of the casing 1 and disposed on one side of the bore 2 is a float the nozzle.

. the casing 1. The chamber 8 turn commumcates with a bore 10 extending downwardly to and communicating with the interiorof the float chamber 5. A second fuel'nozzle, whleh I shall refer to hereinafter as the auxiliary fuel nozzle, is provided at 11 and is screw-threaded into. the casing 1 as .illustrated. The outer end of this nozzle communlcates with the-chamber 12 formed by Patented iteb. s, 1921.

the nozzle and the outwardly extending flange 13 of the casing 1. The chamber 12 communicates with the lower end of the float chamber 5 through the bore shown at 14.

Extending through the casing 1 is a curved an intake tube 15 arranged to direct the incoming current of air past the end of the nozzle 7 and at right-angles to the axis of is employed at 16 and arranged todirect a nozzle 11 and m a direction at right-angles A similar curved air intake tube to the axis of the nozzle 11. The end of the bore 2 opposite the throttle valve 4 is provided with an air intake port 17 arranged to be controlled b the valve 18 pivoted at 19 tothe casing. ommunicating with the bore 2 is an auxiliary air intake port 20 arranged to be controlled by the valve 21 mounted for reciprocation upon the rod 22, in turn carried. by the caslng 1. The inner end of the valve 21 carries a'plunger or piston 23 tightly fitting against the wall of the chamber shown at 24. It will be noted that the piston 23 is so proportioned with respect to the 'valve 21 that atmospheric pressure acting on one side of the piston will balance the depression existing on the inner side of the valve 21, which would otherwise tend to keep this valve closed. The lower end of this last mentioned chamber contains an aperture 25 normally closed by a plun er valve 26. A

coil spring is employed at 2 for holding the plunger valve normally in the position shown. Extending between the bore 2 or the atomizing chamber shown at A and the chamber 28 formed on the underside of the plunger 26, is a passageway29, the arrangement being such that upon the production of a reduction of pressure in the atomizing chamber A, a similar reduction of pressure will 'be provided in the chamber 28. The space above the plunger 26 communicates with the atmosphere through the port 31.

Guided by the plug 32 and extending into the auxiliary nozzle 11 is a needle valve 33 normally held in the position shown, by the 15 current ofair past the, end of the auxiliary coil spring shown at 34. The needle valve is provided with a shoulder 35 resting against the upper side of a lever 36 pivoted at 37 to arod 38 extending outwardly through the casing 1. This rod 38 is arranged to reciprocate through the wall of the casing, and has its outer end attached at 39 to a bell-crank lever 40, in turn pivoted at 41 to the casing. The end of the lever 36 opposite the pivot 37 rests upon a lug 42 extending outwardly from p the stem of the valve 21.

From the construction thus far described it will be observed that upon movement of the bell-crank lever 40 in a clockwise direction, the needle valve 33 will be moved away from the auxiliary nozzle 11, with the result that a greater amount of fuel will be emitted from the nozzle. Likewise if the valve 21 is opened, the lug 42 will swing the lever 36 about its pivot 37 to withdraw the needle valve from its nozzle.

The operation of the device is as follows: As the internal combustion engine with which the carbureter is associated is cranked and the throttle valve 4 is opened, a vacuum or reduction of pressure will be produced in the atomizing chamber A. To satisfy this vacuum or reduction of pressure, air is taken in through the curved tubes shown at 15 and 16. Due to the particular disposition of the nozzles 7 and 11 and the curved intake tubes 15 and 16, the incoming air is caused to pass across the outlet end of the nozzles at right angles to the axes of the nozzles, whereby thorough volatilization of the fuel is secured. As the reduction of pressure increases in the atomizing chamber A, a corresponding reduction of pressure is produced in the chamber 28, with the result that the plunger valve 26 is moved outwardly to provide communication between the .ports 25 and 31. The lower side of the piston 23 is then subjected to atmospheric pressure, and since the inner side of the piston is subjected to the pressure contained in the atomizing chamber, the valve 21 will be moved upwardly to permitthe passage of air through the auxiliary-intake port 20. The valve 21 will be forcedopen because the piston 23 balances the force of atmospheric pressure on the valve 21 as before mentioned. As the valve 21 is moved upwardly the valve 18 iscorrespondingly opened, due to the link connection provided at 43'betweencthe valve 18 andthe valve 21. It will be seen, therefore, that as the speed of the engine increases, the valves 18 and 21 are correspondingly opened and the needle 33 correspondingly withdrawn from its auxiliary nozzle.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A carbureter comprising a casing, an air intake port therefor, a valve for controlling said port, said valvebeing urged closed by atmospheric pressure, the carbureter casing being provided with a cylinder, a piston reciprocable in said cylinder and connected with said valve to actuate the valve, said .piston being so proportioned with respect to said valve as to balance the tendency to close said valve, said piston being operable proportionate to the depression produced in said carbureter casing.

2. A carbureter comprising a casing having an atomizing chamber, a primary and an auxiliary fuel nozzle extending into said chamber, an air intake port for said chamber, a valve for said port subject to atmosheric pressure, said carbureter casing havmg a cylinder, a piston reciprocable in said cylinder connected with said valve and movable proportionate to the depression produced in said atomizing chamber, said piston being arranged to balance the effect of atmospheric pressure on said valve, a metering pin for said auxiliary fuel nozzle and means for connecting said metering pin with said valve for operating both simultaneously.

In witness whereof, I hereunto subscribe my name this 17th day of September, A. D. 1917.

ARTHUR L. PAYTON.

Witnesses MARY A. COOK, ALBIN C. AHLBERG. 

